Defective Product
Recovery for a family injured by an unsafe consumer product after the manufacturer ignored known risks.
St. Louis Mass Tort & Injury Lawyer
Hurt by someone more powerful? We hit back.
Thomas Antoniou takes on negligent corporations, dangerous products, and the platforms harming kids online — and doesn’t stop until you’re made whole.
$0Unless we win
30+Years fighting
24/7Always reachable
Results that matter
Recent case results
Trucking Collision
Settlement for a client catastrophically injured by a commercial vehicle on a Missouri interstate.
Pharmaceutical Mass Tort
Compensation secured as part of coordinated litigation over a dangerous prescription drug.
Premises Liability
Award for a client seriously hurt in a preventable fall caused by a property owner’s negligence.
Client Experiences
“Honest, responsive, and genuinely on your side. He told me the truth from day one and delivered exactly what he promised.
In their words
Different families. Same fight.
A serious injury case is more than paperwork. These are the voices of people who needed clarity, urgency, and a lawyer who kept going.
Maria G.★★★★★
“Thomas treated my case like it was the only one he had. He fought hard and recovered far more than I ever expected.”
David R.★★★★★
“After my accident I felt overwhelmed. His team handled everything and kept me informed — I never felt like just a number.”
The Hollis Family★★★★★
“We came to Thomas after another firm turned us away. He understood what happened to our family and never stopped fighting.”
What we fight for
Practice areas
Mass Tort & Class
Holding pharmaceutical companies and manufacturers accountable when their products harm thousands.
Personal Injury
Serious and catastrophic injuries caused by another's negligence — and the full recovery you're owed.
Auto, Truck & Rideshare
Collisions that leave families facing lost income, mounting bills, and a long road to recovery.
Defective Products
When unsafe drugs, devices, and consumer products cause injury, we pursue those responsible.
Online Harm & Roblox
A focused practice for families whose children were exploited or harmed on online platforms.
Wrongful Death
Determined representation for families seeking justice after a preventable loss.
Free Case Review
Tell us what happened.
Free. Confidential. No obligation. You pay nothing unless we win — so there's no risk in finding out where you stand.
About Thomas
Three decades. One mission.
A St. Louis native, Thomas Antoniou has built his career on pharmaceutical mass tort litigation and representing consumers seriously injured by defective drugs and products — holding manufacturers accountable when what they sell causes harm.
Admitted in Missouri, Illinois, and Colorado and practicing since 1993, Thomas now brings that same fight to his own firm — and to a new frontier: protecting children and families harmed on today's online platforms.
MO-IL-COAdmitted
Since '93Litigating
Wash. U.J.D. 1993
Roblox Injury Center
When the platform fails your child.
Roblox is used by tens of millions of children — and that scale created real danger. Thomas is building a focused practice to hold platforms accountable.
- Predatory grooming & exploitation
- Exposure to harmful or explicit content
- Manipulative monetization of minors
- Inadequate safety & verification
Why clients choose Antoniou Law
No fee. No games. No backing down.
$0Up-front cost to start your case
24/7Reachable when you need answers
1:1Direct attorney access — not a call center
3States admitted — MO, IL & CO
Prior results do not guarantee a similar outcome. Specific case results available upon consultation.